Isaiah 40:6-8
"The voice said, 'Cry out!' And he said, 'What shall I cry?' All flesh is grass, and all its loveliness is like the flower of the field."
"The grass withers, the flower fades, because the breath of the Lord blows upon it; surely the people are grass."
"The grass withers, the flower fades, but the word of our God stands forever."